Formusoft.Authentication.Abstractions 4.0.28

.NET 6.0 This package targets .NET 6.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.6.2 This package targets .NET Framework 4.6.2. The package is compatible with this framework or higher. 
dotnet add package Formusoft.Authentication.Abstractions --version 4.0.28
                    


                    

                
NuGet\Install-Package Formusoft.Authentication.Abstractions -Version 4.0.28
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Formusoft.Authentication.Abstractions" Version="4.0.28" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Formusoft.Authentication.Abstractions" Version="4.0.28" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Formusoft.Authentication.Abstractions" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Formusoft.Authentication.Abstractions --version 4.0.28
                    


                    

                
#r "nuget: Formusoft.Authentication.Abstractions, 4.0.28"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Formusoft.Authentication.Abstractions@4.0.28
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Formusoft.Authentication.Abstractions&version=4.0.28
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Formusoft.Authentication.Abstractions&version=4.0.28
                    


                            Install as a Cake Tool

Formusoft.Authentication.Abstractions

Formusoft.Authentication.Abstractions contains the contracts, models, records, enums, and options used by the Formusoft authentication stack.

This package is intended to be referenced by:

  • the concrete Formusoft.Authentication implementation package
  • calling applications implementing persistence, messaging, user creation, or custom policy behavior
  • other packages that need to integrate with authentication workflows without taking a dependency on the concrete implementation

What is in this package

This package contains:

  • core contracts such as:
    • IAuthRepository<TUser>
    • IAuthUser
    • IPasswordHasher
    • ITokenService<TUser>
    • ITokenHasher
    • IMfaPolicyEvaluator<TUser>
    • IUserFactory<TUser>
    • IEmailSender
    • ISmsSender
    • ITotpService
    • IAccessTokenValidationService
    • IAccessTokenDenyList
    • IRequestContext
  • WebAuthn contracts:
    • IWebAuthnService
    • IWebAuthnCredentialStore
    • IWebAuthnChallengeStore
  • MFA recovery and writer contracts:
    • IMfaMethodWriter
    • IMfaRecoveryCodeStore
  • request/response models for:
    • login
    • registration
    • MFA
    • WebAuthn / passkeys
  • records used for persistence:
    • sessions
    • refresh tokens
    • OTP challenges
    • MFA methods
    • WebAuthn challenges
    • WebAuthn credentials
  • options classes:
    • AuthenticationOptions
    • JwtTokenOptions
    • MfaOptions
    • OtpOptions
    • RefreshTokenOptions
    • TotpOptions

What is not in this package

This package does not contain concrete implementations for:

  • database persistence
  • password hashing
  • email delivery
  • SMS delivery
  • TOTP generation/verification
  • JWT issuance
  • WebAuthn provider logic
  • encryption/protection of secrets

Those are provided either by Formusoft.Authentication, Formusoft.Security, or the calling application.

Typical solution layout

A common setup is:

  • Formusoft.Authentication.Abstractions
  • Formusoft.Authentication
  • Formusoft.Security.Abstractions
  • Formusoft.Security
  • calling application

Required calling-app implementations

At a minimum, a calling application should provide implementations for:

  • IAuthRepository<TUser>
  • IUserFactory<TUser>
  • ITokenHasher

Additional implementations depend on enabled features.

Startup-safe WebAuthn design

Recommended:

  • password login uses OTP/TOTP MFA
  • WebAuthn is separate for sign-in and enrollment

Single-session support

  • RefreshTokenOptions.OneSessionPerUser is default
  • can override with custom policy

Notes

  • Keep secrets protected
  • Normalize identifiers
  • Keep WebAuthn separate from OTP flow
Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 is compatible.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

  • .NETFramework 4.6.2

  • .NETStandard 2.0

  • net10.0

    • No dependencies.

  • net6.0

    • No dependencies.

  • net8.0

    • No dependencies.

NuGet packages (2)

Showing the top 2 NuGet packages that depend on Formusoft.Authentication.Abstractions:

Package Downloads
Formusoft.Authentication

Authentication orchestration and services implementing login flows, MFA handling, session management, and integration with security and persistence layers.
Formusoft.Security

Implementation of security services such as password hashing, token generation, encryption, and cryptographic utilities.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
4.0.28 98 5/31/2026
4.0.27 95 5/28/2026
4.0.26 167 4/29/2026
4.0.25 172 4/29/2026
4.0.24 178 4/25/2026
4.0.23 164 4/25/2026
4.0.22 166 4/25/2026
4.0.21 162 4/25/2026
4.0.20 163 4/25/2026
4.0.19 165 4/24/2026
4.0.18 173 4/24/2026
4.0.17 182 4/23/2026
4.0.16 184 4/23/2026
4.0.15 162 4/23/2026
4.0.14 165 4/23/2026
4.0.13 158 4/22/2026
4.0.12 167 4/22/2026
4.0.11 163 4/22/2026
4.0.10 159 4/22/2026
4.0.9 158 4/20/2026
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